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Diffstat (limited to 'externals/mysql/atomic/gcc_builtins.h')
| -rw-r--r-- | externals/mysql/atomic/gcc_builtins.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/externals/mysql/atomic/gcc_builtins.h b/externals/mysql/atomic/gcc_builtins.h new file mode 100644 index 00000000000..4600a0ef4b1 --- /dev/null +++ b/externals/mysql/atomic/gcc_builtins.h @@ -0,0 +1,38 @@ +/* Copyright (C) 2008 MySQL AB + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ + +#define MY_ATOMIC_MODE "atomic_builtins" + +#define make_atomic_add_body(S) \ + v= __sync_fetch_and_add(a, v); +#define make_atomic_swap_body(S) \ + v= __sync_lock_test_and_set(a, v); +#define make_atomic_cas_body(S) \ + int ## S sav; \ + sav= __sync_val_compare_and_swap(a, *cmp, set); \ + if (!(ret= (sav == *cmp))) *cmp= sav; + +#ifdef MY_ATOMIC_MODE_DUMMY +#define make_atomic_load_body(S) ret= *a +#define make_atomic_store_body(S) *a= v +#define MY_ATOMIC_MODE "gcc-builtins-up" + +#else +#define MY_ATOMIC_MODE "gcc-builtins-smp" +#define make_atomic_load_body(S) \ + ret= __sync_fetch_and_or(a, 0); +#define make_atomic_store_body(S) \ + (void) __sync_lock_test_and_set(a, v); +#endif |